Most photographers would not use their precious lenses without a protective filter to put a barrier on front glass element. The needs are exactly the same for your LCD screen!
These protectors have a black frame around the rim.
2 sets of measurements are provided. The overall width and height and the inner width and height.
i.e. the clear area inside the black frame.
External Width: 67.7
External Height: 46.5
Internal Width: 63.9
Internal Height: 42.7